HarrieH's classic track bike projectA track bike has the beauty of simplicity. No distraction of cables, bottle holders, pumps and other accessories. Just a frame, fork, drivetrain, steering components and something to sit on will do the job on a track.
Some parts I already have for decades, others I have to collect. It's fun to look for the right components, to get them, build up the bike and, of course, ride it on the velodrome.
Oh, besides track, lots of (off-)road stuff as well.

These SM-SH70 cleats are the "fixed mode" cleats for Dura Ace road SPD pedals PD-7410.
The "fixed cleats" can be recognized by the 2 concentric circles on the cleats, the "float" cleats SM-SH71 have arrows instead.
The metal bridge with the 2 plastic parts, called "pontoons", must be used.
Road shoes don't have space for recessed cleats in the shoe tread (compared with touring or MTB shoes).
The pontoons enable for more or less safe walking (don't over estimate this) and give extra support or contact surface (stability) when the shoes and cleats have been clicked into the pedals.